package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;
import java.util.stream.Collectors;

import static java.lang.System.out;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    //统计指定区间内营业额数据
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询data日期对应的营业额数据，营业额是指状态为已完成的订单数据金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天新增用户
        List<Integer> newUserList = new ArrayList<>();
        //每天总用户
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询data日期对应的营业额数据，营业额是指状态为已完成的订单数据金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            //总用户数量
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin", beginTime);
            //新增用户数量
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //存放每天有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        //遍历集合，查询每天的有效订单数和订单总数
        for (LocalDate date : dateList) {
            //每天总数
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //每天有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算时间区间内订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //计算订单完成率
        Double orderCompletionRate = 0.0;
        if (validOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getsalesTop10Statistics(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers= salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    //导出运营暑假报表
    @Override
    public void exportBusinessData(HttpServletResponse response) {
//        1.查询数据库、获取营业数据---资询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd= LocalDate.now().minusDays(1);
//         查询概览数据
        LocalDateTime beginTime = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(dateEnd, LocalTime.MAX);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(beginTime, endTime);

//        2.通过P0I将数据写入到Excel文件中
        InputStream in =this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建新的excel文件
        try {
            XSSFWorkbook excel =new XSSFWorkbook(in);
//           获取表格文件标签页
            XSSFSheet shape=excel.getSheet("Sheet1");
            //填充数据--时间
            shape.getRow(1).getCell(1).setCellValue("时间："+dateBegin+"至"+dateEnd);
            shape.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
            shape.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            shape.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());
            shape.getRow(4).getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            shape.getRow(4).getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i=0;i<30;i++){
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                XSSFRow row = shape.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

//            3、通过输出流将Excel文件下线到客户编调览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            out.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);

        }
    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }
}
